I had to pay $100 for this for my Pre Calculus college course. I am SO mad that you can only get a refund during a 14 day grace period because this software has caused my grade to PLUMMET. I have NEVER been more disappointed in ANYTHING in my entire life. What kind of MATH website is CASE SENSITIVE in places where it does not matter? According to WebAssign, it is up to the dingbat who wrote that specific question whether or not some letters will...